/Engine/Plugins/FX/Niagara/Source/NiagaraEditor/Public/Widgets/SNiagaraParameterPanel.h
const [FNiagaraVariableBase](API\Plugins\Niagara\FNiagaraVariableBase) & OnGetKeyForItem ( const [FNiagaraParameterPanelItem](API\Plugins\NiagaraEditor\FNiagaraParameterPanelItem) & Item ) const